Twister head



Jan. 14, 1958 R B, NEWTON 2,819,581

TWISTER HEAD Filed Nov. 4, 1954 1x VENTUR.

j 'Y 53038 A/EWTON IA United States Patent O Nice N TWISTER HEAD Ross B. Newton, Whitinsville, Mass., assignor to Whitin Machine Works, Whitinsville, Mass., a corporation of Massachusetts Application November 4, 1954, Serial No. 466,800

2 Claims. (Cl. 57--77.4)

This invention relates to a twister head particularly designed for use in a Wool spinning frame. A twister head of this general type is shown in the prior patent to Hendrickson and Mitchell, No. 1,774,371, which issued by assignment to Whitin Machine Works, the assignee of this present application.

In this general type of twister head, the roving is passed down through a vertically-rotated tubular member and is loosely engaged by gripping members or nippers mounted at the lower end of said tubular member.

It is customary to provide one gripping member which is fixed to the rotated tubular member, and a second gripping member which is pivoted on said tubular member and is movable by centrifugal force to engage the roving.

One object of the present invention is to provide duplicate and interchangeable fixed and movable gripping members or nippers.

A further object is to provide a twister head in Which all parts are disposed Within a surface of revolution, and in which no parts project beyond said surface. I also provide convenient means for raising or lowering the gripping members relative -to the tubular member and drawing rolls, and for preserving a selected vertical adjustment.

Other features of the invention relate to the provision of an improved bearing construction for the tubular member, and to the provision of improved means for securing the twister head in a supporting frame but permitting convenient removal therefrom.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly set forth in the appended claims.

A preferred form of the invention is shown in the drawings, in which- Fig. 1 is a side elevation of a twister head embodying my improvements;

Fig. 2 is a vertical Sectional` side elevation of the twister head shown in Fig. 1; and

Fig. 3 is a Sectional plan view, taken along the line 3 3 in Fig. 2.

Referring to the drawings, my improved twister head comprises a vertical tubular member having a driving whirl 11 mounted thereon and also provided with a sealed anti-friction bearing 12 which is mounted in a fixed bracket 14 and which is held therein by a U-shaped plate or member 16. The bracket 14 is slotted to receive the two legs of the plate 16, and the 'bearing 12 has a groove 18 adapted to receive the inner edge portions of said legs. These edge poru'ons have slightly Iecessed inner faces, and the entire member 16 is suffi- 2,819,581 -f Patented Jan; 14, 1958 ciently resilient t-o permit the inner edge `portions thereof to be snapped in place as shown in Fig. 3. The plate 16 thus determines the vertical position of the member 10.

The tubular member 10 is provided at its upper end with the usual cap 20 and the usual oppositely-disposed and hardened steel pins 21. The lower part of the tubular member 10 is threaed at 30 and has a reduced lower end portion 31.

Roving-engaging gripping members or nippers 33 and 34 are mounted in a head 35 which may be formed of aluminum or other relatively light metal and which is preferably substantially spherical, as clearly shown in the drawing.

The head 35 has a cylindrical opening 40 loosely fitting the threaded end portion 30 of the tubular member 10, and also has a cylindrical opening 41 fitting the downwardly-projecting end portion 31 of the member 10.

A screw 44 is threaded into a hole 45 in the head 35,. and a plug 46, preferably of nylon, is inserted between the screw 45 and the threaded end portion 30 of the member 10. By applying pressure through the screw 44, the inner end of the plug 46 will be grooved by the threads of the end portion 30 and will thereafter act as a nut for adjustment of the head 35 upward or downward on the tubular member 10.

By further tightening of the screw 44, any desired adjustment may be permanently maintained. Such adjustment is frequently desired to dispose the gripping members or nippers in desired vertical relation to the drawing rolls R and R' (Fig. 1).

The gripping members or .nippers 33 and 34 are exact duplicates, and the fixed member 33 is secured to the head 35 by a clamping screw 50. The movable member 34 is secured to a weight 52 by a screw 53, and the weight 52 is pivoted on a cross-pin 55 fixed in the head 35.

With this construction, it will be seen that all parts of the gripping members except their extreme lower ends are mounted within the spherical surface of the member 35, so that air resistance is minimized and that circulation of air by the rotating twister heads is substantially avoided. This results in much cleaner operation of the spinning frame.

Attention is called to the fact that the opening 60 in the bracket 14 which receives the bearing 12 is of larger diameter than the head 35, so that withdrawal of the U-shaped plate 16 permits free upward removal of the entire twister head for repairs or other desired purposes.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. In a twister head, a vertically-disposed rotated tubular member, a bearing for said member, a pair of gripping members one of which is relatively fixed and the other relatively movable with respect to the tubular member, a head in which said gripping members are mounted, said head having an outer and substantially spherical surface, and all parts of said gripping members except the substantially axially disposed extreme lower end portions thereof being disposed within said spherical surface and shielded from air resistance.

2. The combination in a gripping head as set forth in Vclaim 1, in which the tubular member has a threaded portion in its lower part, and in which the head has a plain cylindric-al recess fitting said threaded portion, an

impressionable plugy mounted in said head andI adjacent said `threaded portion, and a screw efiective to seat said plug against said threaded portion and in threaded engagement therewith, Where'by said head is positively and axially adjustable on said tubular member by rotary movement of said head relative to said member.

References Cited in the file of this patent UNITED STATES PATENTSv 99,674 House Feb. 8, 1870 

